Make callback exception propagation test stricter
Make callback exception propagation test stricter

Propagating Python exceptions from callbacks through the C context back to the
original caller does not currently happen, is nontrivial/unsafe to implement,
and not desirable at this point any more as by now we have established the
current behaviour. So remove the catching of ZeroDivisionError in the tests.

https://bugzilla.gnome.org/show_bug.cgi?id=616279

GNOME/pygobject,davidmalcolm/pygobject,davibe/pygobject,sfeltman/pygobject,davidmalcolm/pygobject,sfeltman/pygobject,pexip/pygobject,thiblahute/pygobject,MathieuDuponchelle/pygobject,davidmalcolm/pygobject,MathieuDuponchelle/pygobject,choeger/pygobject-cmake,choeger/pygobject-cmake,thiblahute/pygobject,pexip/pygobject,davibe/pygobject,GNOME/pygobject,jdahlin/pygobject,davibe/pygobject,GNOME/pygobject,davibe/pygobject,sfeltman/pygobject,jdahlin/pygobject,pexip/pygobject,jdahlin/pygobject,choeger/pygobject-cmake,thiblahute/pygobject,MathieuDuponchelle/pygobject